java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerC.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf --traceabstraction.trace.refinement.strategy SIFA_TAIPAN --sifa.abstract.domain CompoundDomain --rcfgbuilder.size.of.a.code.block LoopFreeBlock --sifa.call.summarizer TopInputCallSummarizer --sifa.fluid SizeLimitFluid --sifa.simplification.technique SIMPLIFY_QUICK -i ../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c -------------------------------------------------------------------------------- This is Ultimate 0.1.24-36ac518-m [2019-10-07 17:13:50,280 INFO L177 SettingsManager]: Resetting all preferences to default values... [2019-10-07 17:13:50,283 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2019-10-07 17:13:50,302 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2019-10-07 17:13:50,303 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2019-10-07 17:13:50,305 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2019-10-07 17:13:50,307 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2019-10-07 17:13:50,319 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2019-10-07 17:13:50,321 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2019-10-07 17:13:50,323 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2019-10-07 17:13:50,324 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2019-10-07 17:13:50,325 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2019-10-07 17:13:50,326 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2019-10-07 17:13:50,329 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2019-10-07 17:13:50,332 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2019-10-07 17:13:50,334 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2019-10-07 17:13:50,335 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2019-10-07 17:13:50,338 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2019-10-07 17:13:50,340 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2019-10-07 17:13:50,344 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2019-10-07 17:13:50,348 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2019-10-07 17:13:50,351 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2019-10-07 17:13:50,354 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2019-10-07 17:13:50,355 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2019-10-07 17:13:50,358 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2019-10-07 17:13:50,358 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2019-10-07 17:13:50,358 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2019-10-07 17:13:50,360 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2019-10-07 17:13:50,361 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2019-10-07 17:13:50,362 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2019-10-07 17:13:50,363 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2019-10-07 17:13:50,364 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2019-10-07 17:13:50,365 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2019-10-07 17:13:50,366 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2019-10-07 17:13:50,369 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2019-10-07 17:13:50,369 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2019-10-07 17:13:50,370 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2019-10-07 17:13:50,370 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2019-10-07 17:13:50,371 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2019-10-07 17:13:50,371 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2019-10-07 17:13:50,373 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2019-10-07 17:13:50,374 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2019-10-07 17:13:50,392 INFO L113 SettingsManager]: Loading preferences was successful [2019-10-07 17:13:50,393 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2019-10-07 17:13:50,395 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2019-10-07 17:13:50,395 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2019-10-07 17:13:50,395 INFO L138 SettingsManager]: * Use SBE=true [2019-10-07 17:13:50,395 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2019-10-07 17:13:50,395 INFO L138 SettingsManager]: * sizeof long=4 [2019-10-07 17:13:50,396 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2019-10-07 17:13:50,396 INFO L138 SettingsManager]: * sizeof POINTER=4 [2019-10-07 17:13:50,396 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2019-10-07 17:13:50,397 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2019-10-07 17:13:50,397 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2019-10-07 17:13:50,397 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2019-10-07 17:13:50,398 INFO L138 SettingsManager]: * sizeof long double=12 [2019-10-07 17:13:50,398 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2019-10-07 17:13:50,398 INFO L138 SettingsManager]: * Use constant arrays=true [2019-10-07 17:13:50,398 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2019-10-07 17:13:50,399 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2019-10-07 17:13:50,399 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2019-10-07 17:13:50,399 INFO L138 SettingsManager]: * To the following directory=./dump/ [2019-10-07 17:13:50,399 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2019-10-07 17:13:50,399 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:13:50,400 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2019-10-07 17:13:50,400 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2019-10-07 17:13:50,400 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2019-10-07 17:13:50,400 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2019-10-07 17:13:50,400 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2019-10-07 17:13:50,401 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2019-10-07 17:13:50,401 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Trace refinement strategy -> SIFA_TAIPAN Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Abstract Domain -> CompoundDomain Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder: Size of a code block -> LoopFreeBlock Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Call Summarizer -> TopInputCallSummarizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Fluid -> SizeLimitFluid Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.sifa: Simplification Technique -> SIMPLIFY_QUICK [2019-10-07 17:13:50,682 INFO L81 nceAwareModelManager]: Repository-Root is: /tmp [2019-10-07 17:13:50,694 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2019-10-07 17:13:50,698 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2019-10-07 17:13:50,699 INFO L271 PluginConnector]: Initializing CDTParser... [2019-10-07 17:13:50,700 INFO L275 PluginConnector]: CDTParser initialized [2019-10-07 17:13:50,701 INFO L428 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2019-10-07 17:13:50,758 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaa61165/0b29f526d4364da9b08a374a2205eba0/FLAG340e8131b [2019-10-07 17:13:51,218 INFO L306 CDTParser]: Found 1 translation units. [2019-10-07 17:13:51,220 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/systemc/pc_sfifo_1.cil-2.c [2019-10-07 17:13:51,228 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaa61165/0b29f526d4364da9b08a374a2205eba0/FLAG340e8131b [2019-10-07 17:13:51,585 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1aaa61165/0b29f526d4364da9b08a374a2205eba0 [2019-10-07 17:13:51,595 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2019-10-07 17:13:51,597 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2019-10-07 17:13:51,598 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2019-10-07 17:13:51,598 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2019-10-07 17:13:51,601 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2019-10-07 17:13:51,602 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:13:51" (1/1) ... [2019-10-07 17:13:51,605 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5cf55952 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:51, skipping insertion in model container [2019-10-07 17:13:51,605 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.10 05:13:51" (1/1) ... [2019-10-07 17:13:51,613 INFO L142 MainTranslator]: Starting translation in SV-COMP mode [2019-10-07 17:13:51,640 INFO L173 MainTranslator]: Built tables and reachable declarations [2019-10-07 17:13:51,904 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:13:51,910 INFO L188 MainTranslator]: Completed pre-run [2019-10-07 17:13:52,033 INFO L206 PostProcessor]: Analyzing one entry point: main [2019-10-07 17:13:52,051 INFO L192 MainTranslator]: Completed translation [2019-10-07 17:13:52,052 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52 WrapperNode [2019-10-07 17:13:52,052 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2019-10-07 17:13:52,052 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2019-10-07 17:13:52,053 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2019-10-07 17:13:52,053 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2019-10-07 17:13:52,071 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,071 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,079 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,080 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,087 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,098 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,100 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... [2019-10-07 17:13:52,102 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2019-10-07 17:13:52,103 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2019-10-07 17:13:52,103 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2019-10-07 17:13:52,103 INFO L275 PluginConnector]: RCFGBuilder initialized [2019-10-07 17:13:52,104 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2019-10-07 17:13:52,158 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.init [2019-10-07 17:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2019-10-07 17:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure error [2019-10-07 17:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_write_p_triggered [2019-10-07 17:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure is_do_read_c_triggered [2019-10-07 17:13:52,159 INFO L138 BoogieDeclarations]: Found implementation of procedure immediate_notify_threads [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure do_write_p [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure do_read_c [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure init_threads [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure exists_runnable_thread [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure eval [2019-10-07 17:13:52,160 INFO L138 BoogieDeclarations]: Found implementation of procedure stop_simulation [2019-10-07 17:13:52,161 INFO L138 BoogieDeclarations]: Found implementation of procedure start_simulation [2019-10-07 17:13:52,161 INFO L138 BoogieDeclarations]: Found implementation of procedure init_model [2019-10-07 17:13:52,161 INFO L138 BoogieDeclarations]: Found implementation of procedure main [2019-10-07 17:13:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_error [2019-10-07 17:13:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_nondet_int [2019-10-07 17:13:52,161 INFO L130 BoogieDeclarations]: Found specification of procedure error [2019-10-07 17:13:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_write_p_triggered [2019-10-07 17:13:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure is_do_read_c_triggered [2019-10-07 17:13:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure immediate_notify_threads [2019-10-07 17:13:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure do_write_p [2019-10-07 17:13:52,162 INFO L130 BoogieDeclarations]: Found specification of procedure do_read_c [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure init_threads [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure exists_runnable_thread [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure eval [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure stop_simulation [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure start_simulation [2019-10-07 17:13:52,163 INFO L130 BoogieDeclarations]: Found specification of procedure init_model [2019-10-07 17:13:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure main [2019-10-07 17:13:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.init [2019-10-07 17:13:52,164 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2019-10-07 17:13:52,761 INFO L279 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2019-10-07 17:13:52,761 INFO L284 CfgBuilder]: Removed 4 assume(true) statements. [2019-10-07 17:13:52,764 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:13:52 BoogieIcfgContainer [2019-10-07 17:13:52,764 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2019-10-07 17:13:52,765 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2019-10-07 17:13:52,766 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2019-10-07 17:13:52,769 INFO L275 PluginConnector]: TraceAbstraction initialized [2019-10-07 17:13:52,769 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.10 05:13:51" (1/3) ... [2019-10-07 17:13:52,770 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547a9b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:13:52, skipping insertion in model container [2019-10-07 17:13:52,771 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.10 05:13:52" (2/3) ... [2019-10-07 17:13:52,771 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@547a9b8d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.10 05:13:52, skipping insertion in model container [2019-10-07 17:13:52,772 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.10 05:13:52" (3/3) ... [2019-10-07 17:13:52,783 INFO L109 eAbstractionObserver]: Analyzing ICFG pc_sfifo_1.cil-2.c [2019-10-07 17:13:52,797 INFO L152 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2019-10-07 17:13:52,808 INFO L164 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2019-10-07 17:13:52,820 INFO L249 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2019-10-07 17:13:52,845 INFO L373 AbstractCegarLoop]: Interprodecural is true [2019-10-07 17:13:52,846 INFO L374 AbstractCegarLoop]: Hoare is true [2019-10-07 17:13:52,846 INFO L375 AbstractCegarLoop]: Compute interpolants for FPandBP [2019-10-07 17:13:52,846 INFO L376 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2019-10-07 17:13:52,846 INFO L377 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2019-10-07 17:13:52,846 INFO L378 AbstractCegarLoop]: Difference is false [2019-10-07 17:13:52,846 INFO L379 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2019-10-07 17:13:52,847 INFO L383 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2019-10-07 17:13:52,864 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states. [2019-10-07 17:13:52,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2019-10-07 17:13:52,871 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:52,872 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:52,874 INFO L410 AbstractCegarLoop]: === Iteration 1 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:52,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:52,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1371163158, now seen corresponding path program 1 times [2019-10-07 17:13:52,889 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:52,890 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:52,890 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:52,890 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:52,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:53,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:53,230 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:53,231 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:53,231 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:53,232 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 17:13:53,237 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 17:13:53,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 17:13:53,250 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2019-10-07 17:13:53,252 INFO L87 Difference]: Start difference. First operand 87 states. Second operand 5 states. [2019-10-07 17:13:53,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:53,562 INFO L93 Difference]: Finished difference Result 222 states and 297 transitions. [2019-10-07 17:13:53,562 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2019-10-07 17:13:53,564 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 51 [2019-10-07 17:13:53,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:53,578 INFO L225 Difference]: With dead ends: 222 [2019-10-07 17:13:53,578 INFO L226 Difference]: Without dead ends: 136 [2019-10-07 17:13:53,582 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2019-10-07 17:13:53,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2019-10-07 17:13:53,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 132. [2019-10-07 17:13:53,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2019-10-07 17:13:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 165 transitions. [2019-10-07 17:13:53,654 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 165 transitions. Word has length 51 [2019-10-07 17:13:53,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:53,655 INFO L462 AbstractCegarLoop]: Abstraction has 132 states and 165 transitions. [2019-10-07 17:13:53,655 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 17:13:53,656 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 165 transitions. [2019-10-07 17:13:53,659 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2019-10-07 17:13:53,659 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:53,660 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:53,660 INFO L410 AbstractCegarLoop]: === Iteration 2 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:53,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:53,661 INFO L82 PathProgramCache]: Analyzing trace with hash 3564182, now seen corresponding path program 1 times [2019-10-07 17:13:53,661 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:53,661 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:53,661 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:53,661 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:53,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:53,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:53,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:53,827 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:53,827 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:53,827 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2019-10-07 17:13:53,829 INFO L442 AbstractCegarLoop]: Interpolant automaton has 5 states [2019-10-07 17:13:53,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2019-10-07 17:13:53,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2019-10-07 17:13:53,830 INFO L87 Difference]: Start difference. First operand 132 states and 165 transitions. Second operand 5 states. [2019-10-07 17:13:54,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:54,393 INFO L93 Difference]: Finished difference Result 523 states and 754 transitions. [2019-10-07 17:13:54,393 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2019-10-07 17:13:54,393 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 58 [2019-10-07 17:13:54,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:54,400 INFO L225 Difference]: With dead ends: 523 [2019-10-07 17:13:54,400 INFO L226 Difference]: Without dead ends: 404 [2019-10-07 17:13:54,403 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2019-10-07 17:13:54,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 404 states. [2019-10-07 17:13:54,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 404 to 351. [2019-10-07 17:13:54,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 351 states. [2019-10-07 17:13:54,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 351 states to 351 states and 489 transitions. [2019-10-07 17:13:54,501 INFO L78 Accepts]: Start accepts. Automaton has 351 states and 489 transitions. Word has length 58 [2019-10-07 17:13:54,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:54,502 INFO L462 AbstractCegarLoop]: Abstraction has 351 states and 489 transitions. [2019-10-07 17:13:54,502 INFO L463 AbstractCegarLoop]: Interpolant automaton has 5 states. [2019-10-07 17:13:54,502 INFO L276 IsEmpty]: Start isEmpty. Operand 351 states and 489 transitions. [2019-10-07 17:13:54,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2019-10-07 17:13:54,512 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:54,513 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:54,516 INFO L410 AbstractCegarLoop]: === Iteration 3 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:54,516 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:54,517 INFO L82 PathProgramCache]: Analyzing trace with hash 862480819, now seen corresponding path program 1 times [2019-10-07 17:13:54,517 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:54,517 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:54,517 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:54,518 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:54,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:54,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:54,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:54,660 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:54,661 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:54,661 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2019-10-07 17:13:54,662 INFO L442 AbstractCegarLoop]: Interpolant automaton has 3 states [2019-10-07 17:13:54,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2019-10-07 17:13:54,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:13:54,663 INFO L87 Difference]: Start difference. First operand 351 states and 489 transitions. Second operand 3 states. [2019-10-07 17:13:54,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:54,735 INFO L93 Difference]: Finished difference Result 957 states and 1466 transitions. [2019-10-07 17:13:54,736 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2019-10-07 17:13:54,736 INFO L78 Accepts]: Start accepts. Automaton has 3 states. Word has length 52 [2019-10-07 17:13:54,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:54,742 INFO L225 Difference]: With dead ends: 957 [2019-10-07 17:13:54,742 INFO L226 Difference]: Without dead ends: 619 [2019-10-07 17:13:54,746 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2019-10-07 17:13:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2019-10-07 17:13:54,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 615. [2019-10-07 17:13:54,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 615 states. [2019-10-07 17:13:54,831 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 615 states to 615 states and 901 transitions. [2019-10-07 17:13:54,832 INFO L78 Accepts]: Start accepts. Automaton has 615 states and 901 transitions. Word has length 52 [2019-10-07 17:13:54,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:54,832 INFO L462 AbstractCegarLoop]: Abstraction has 615 states and 901 transitions. [2019-10-07 17:13:54,832 INFO L463 AbstractCegarLoop]: Interpolant automaton has 3 states. [2019-10-07 17:13:54,832 INFO L276 IsEmpty]: Start isEmpty. Operand 615 states and 901 transitions. [2019-10-07 17:13:54,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-07 17:13:54,835 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:54,835 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:54,836 INFO L410 AbstractCegarLoop]: === Iteration 4 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:54,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:54,836 INFO L82 PathProgramCache]: Analyzing trace with hash 2080205856, now seen corresponding path program 1 times [2019-10-07 17:13:54,836 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:54,837 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:54,837 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:54,837 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:54,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:54,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:54,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:54,952 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:54,952 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:54,952 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:13:54,953 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:13:54,953 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:13:54,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:13:54,954 INFO L87 Difference]: Start difference. First operand 615 states and 901 transitions. Second operand 4 states. [2019-10-07 17:13:55,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:55,126 INFO L93 Difference]: Finished difference Result 1110 states and 1707 transitions. [2019-10-07 17:13:55,126 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:13:55,127 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 53 [2019-10-07 17:13:55,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:55,131 INFO L225 Difference]: With dead ends: 1110 [2019-10-07 17:13:55,131 INFO L226 Difference]: Without dead ends: 535 [2019-10-07 17:13:55,136 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:13:55,136 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 535 states. [2019-10-07 17:13:55,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 535 to 526. [2019-10-07 17:13:55,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 526 states. [2019-10-07 17:13:55,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 526 states to 526 states and 709 transitions. [2019-10-07 17:13:55,188 INFO L78 Accepts]: Start accepts. Automaton has 526 states and 709 transitions. Word has length 53 [2019-10-07 17:13:55,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:55,189 INFO L462 AbstractCegarLoop]: Abstraction has 526 states and 709 transitions. [2019-10-07 17:13:55,190 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:13:55,190 INFO L276 IsEmpty]: Start isEmpty. Operand 526 states and 709 transitions. [2019-10-07 17:13:55,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2019-10-07 17:13:55,192 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:55,193 INFO L385 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:55,194 INFO L410 AbstractCegarLoop]: === Iteration 5 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:55,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:55,195 INFO L82 PathProgramCache]: Analyzing trace with hash -99765919, now seen corresponding path program 1 times [2019-10-07 17:13:55,195 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:55,195 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:55,195 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:55,196 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:55,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:55,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:55,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:55,351 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:55,351 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:55,351 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2019-10-07 17:13:55,352 INFO L442 AbstractCegarLoop]: Interpolant automaton has 7 states [2019-10-07 17:13:55,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2019-10-07 17:13:55,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2019-10-07 17:13:55,352 INFO L87 Difference]: Start difference. First operand 526 states and 709 transitions. Second operand 7 states. [2019-10-07 17:13:56,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:56,221 INFO L93 Difference]: Finished difference Result 1356 states and 2010 transitions. [2019-10-07 17:13:56,222 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2019-10-07 17:13:56,222 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 53 [2019-10-07 17:13:56,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:56,230 INFO L225 Difference]: With dead ends: 1356 [2019-10-07 17:13:56,230 INFO L226 Difference]: Without dead ends: 874 [2019-10-07 17:13:56,234 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 7 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2019-10-07 17:13:56,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 874 states. [2019-10-07 17:13:56,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 874 to 684. [2019-10-07 17:13:56,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 684 states. [2019-10-07 17:13:56,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 684 states to 684 states and 929 transitions. [2019-10-07 17:13:56,308 INFO L78 Accepts]: Start accepts. Automaton has 684 states and 929 transitions. Word has length 53 [2019-10-07 17:13:56,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:56,308 INFO L462 AbstractCegarLoop]: Abstraction has 684 states and 929 transitions. [2019-10-07 17:13:56,308 INFO L463 AbstractCegarLoop]: Interpolant automaton has 7 states. [2019-10-07 17:13:56,308 INFO L276 IsEmpty]: Start isEmpty. Operand 684 states and 929 transitions. [2019-10-07 17:13:56,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2019-10-07 17:13:56,310 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:56,310 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:56,310 INFO L410 AbstractCegarLoop]: === Iteration 6 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:56,310 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:56,311 INFO L82 PathProgramCache]: Analyzing trace with hash -241348593, now seen corresponding path program 1 times [2019-10-07 17:13:56,311 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:56,312 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:56,312 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,312 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:56,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:56,374 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 11 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2019-10-07 17:13:56,375 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:56,375 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:56,375 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:13:56,394 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:13:56,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:13:56,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:13:56,395 INFO L87 Difference]: Start difference. First operand 684 states and 929 transitions. Second operand 4 states. [2019-10-07 17:13:56,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:56,526 INFO L93 Difference]: Finished difference Result 1499 states and 2239 transitions. [2019-10-07 17:13:56,526 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:13:56,526 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 69 [2019-10-07 17:13:56,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:56,533 INFO L225 Difference]: With dead ends: 1499 [2019-10-07 17:13:56,533 INFO L226 Difference]: Without dead ends: 828 [2019-10-07 17:13:56,537 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:13:56,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 828 states. [2019-10-07 17:13:56,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 828 to 780. [2019-10-07 17:13:56,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 780 states. [2019-10-07 17:13:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 780 states to 780 states and 1126 transitions. [2019-10-07 17:13:56,605 INFO L78 Accepts]: Start accepts. Automaton has 780 states and 1126 transitions. Word has length 69 [2019-10-07 17:13:56,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:56,605 INFO L462 AbstractCegarLoop]: Abstraction has 780 states and 1126 transitions. [2019-10-07 17:13:56,605 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:13:56,605 INFO L276 IsEmpty]: Start isEmpty. Operand 780 states and 1126 transitions. [2019-10-07 17:13:56,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2019-10-07 17:13:56,608 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:56,608 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:56,608 INFO L410 AbstractCegarLoop]: === Iteration 7 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:56,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:56,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1285451814, now seen corresponding path program 1 times [2019-10-07 17:13:56,609 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:56,609 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:56,609 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,609 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:56,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:56,661 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 17:13:56,662 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:56,662 INFO L211 tionRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2019-10-07 17:13:56,662 INFO L224 tionRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2019-10-07 17:13:56,663 INFO L442 AbstractCegarLoop]: Interpolant automaton has 4 states [2019-10-07 17:13:56,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2019-10-07 17:13:56,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2019-10-07 17:13:56,663 INFO L87 Difference]: Start difference. First operand 780 states and 1126 transitions. Second operand 4 states. [2019-10-07 17:13:56,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2019-10-07 17:13:56,805 INFO L93 Difference]: Finished difference Result 893 states and 1339 transitions. [2019-10-07 17:13:56,805 INFO L142 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2019-10-07 17:13:56,806 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 80 [2019-10-07 17:13:56,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2019-10-07 17:13:56,813 INFO L225 Difference]: With dead ends: 893 [2019-10-07 17:13:56,813 INFO L226 Difference]: Without dead ends: 890 [2019-10-07 17:13:56,814 INFO L606 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2019-10-07 17:13:56,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2019-10-07 17:13:56,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 807. [2019-10-07 17:13:56,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 807 states. [2019-10-07 17:13:56,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1182 transitions. [2019-10-07 17:13:56,885 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1182 transitions. Word has length 80 [2019-10-07 17:13:56,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2019-10-07 17:13:56,885 INFO L462 AbstractCegarLoop]: Abstraction has 807 states and 1182 transitions. [2019-10-07 17:13:56,885 INFO L463 AbstractCegarLoop]: Interpolant automaton has 4 states. [2019-10-07 17:13:56,886 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1182 transitions. [2019-10-07 17:13:56,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2019-10-07 17:13:56,888 INFO L377 BasicCegarLoop]: Found error trace [2019-10-07 17:13:56,889 INFO L385 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2019-10-07 17:13:56,889 INFO L410 AbstractCegarLoop]: === Iteration 8 === [errorErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2019-10-07 17:13:56,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2019-10-07 17:13:56,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1194604893, now seen corresponding path program 1 times [2019-10-07 17:13:56,890 INFO L150 tionRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2019-10-07 17:13:56,890 INFO L231 tionRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:56,890 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,890 INFO L117 rtionOrderModulation]: Craig_TreeInterpolation forces the order to NOT_INCREMENTALLY [2019-10-07 17:13:56,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2019-10-07 17:13:56,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:57,017 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 17:13:57,017 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019-10-07 17:13:57,018 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2019-10-07 17:13:57,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:13:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2019-10-07 17:13:57,164 INFO L256 TraceCheckSpWp]: Trace formula consists of 573 conjuncts, 33 conjunts are in the unsatisfiable core [2019-10-07 17:13:57,175 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2019-10-07 17:13:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2019-10-07 17:13:57,305 INFO L322 TraceCheckSpWp]: Computing backward predicates... [2019-10-07 17:13:57,420 INFO L319 QuantifierPusher]: Applying distributivity, recursing on 3 terms [2019-10-07 17:13:57,522 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2019-10-07 17:13:57,523 INFO L286 tionRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2019-10-07 17:13:57,553 INFO L162 IcfgInterpreter]: Started Sifa with 65 locations of interest [2019-10-07 17:13:57,554 INFO L169 IcfgInterpreter]: Building call graph [2019-10-07 17:13:57,565 INFO L174 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2019-10-07 17:13:57,575 INFO L179 IcfgInterpreter]: Starting interpretation [2019-10-07 17:13:57,576 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2019-10-07 17:13:57,808 INFO L199 IcfgInterpreter]: Interpreting procedure ULTIMATE.init with input of size 46 for LOIs [2019-10-07 17:13:57,841 INFO L199 IcfgInterpreter]: Interpreting procedure main with input of size 68 for LOIs [2019-10-07 17:13:58,323 INFO L199 IcfgInterpreter]: Interpreting procedure init_model with input of size 52 for LOIs [2019-10-07 17:13:58,437 INFO L199 IcfgInterpreter]: Interpreting procedure start_simulation with input of size 74 for LOIs [2019-10-07 17:13:58,937 WARN L191 SmtUtils]: Spent 138.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 129 [2019-10-07 17:13:59,735 WARN L191 SmtUtils]: Spent 142.00 ms on a formula simplification. DAG size of input: 129 DAG size of output: 129 [2019-10-07 17:13:59,907 INFO L199 IcfgInterpreter]: Interpreting procedure eval with input of size 94 for LOIs [2019-10-07 17:14:02,379 WARN L499 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2019-10-07 17:14:02,380 FATAL L? ?]: The Plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction has thrown an exception: java.lang.AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.generateProof(TraceAbstractionRefinementEngine.java:177) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.executeStrategy(TraceAbstractionRefinementEngine.java:167) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.(TraceAbstractionRefinementEngine.java:90) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.RefinementEngineFactory.runRefinementEngine(RefinementEngineFactory.java:133) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.BasicCegarLoop.isCounterexampleFeasible(BasicCegarLoop.java:436) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterateInternal(AbstractCegarLoop.java:419) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.AbstractCegarLoop.iterate(AbstractCegarLoop.java:368) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.iterate(TraceAbstractionStarter.java:332) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.runCegarLoops(TraceAbstractionStarter.java:170) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionStarter.(TraceAbstractionStarter.java:122) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver.finish(TraceAbstractionObserver.java:120) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runObserver(PluginConnector.java:168) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.runTool(PluginConnector.java:151) at de.uni_freiburg.informatik.ultimate.core.coreplugin.PluginConnector.run(PluginConnector.java:128) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.executePluginConnector(ToolchainWalker.java:232) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.processPlugin(ToolchainWalker.java:226) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walkUnprotected(ToolchainWalker.java:142) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainWalker.walk(ToolchainWalker.java:104) at de.uni_freiburg.informatik.ultimate.core.coreplugin.ToolchainManager$Toolchain.processToolchain(ToolchainManager.java:316) at de.uni_freiburg.informatik.ultimate.core.coreplugin.toolchain.DefaultToolchainJob.run(DefaultToolchainJob.java:145) at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55) Caused by: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε at de.uni_freiburg.informatik.ultimate.lib.sifa.PriorityWorklist.add(PriorityWorklist.java:97) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.lambda$2(DagInterpreter.java:135) at java.lang.Iterable.forEach(Iterable.java:75) at java.util.Collections$UnmodifiableCollection.forEach(Collections.java:1080) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:135) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:104) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.computeTopSummary(TopInputCallSummarizer.java:78) at java.util.HashMap.computeIfAbsent(HashMap.java:1127) at de.uni_freiburg.informatik.ultimate.lib.sifa.summarizers.TopInputCallSummarizer.summarize(TopInputCallSummarizer.java:67) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretCallReturnSummary(DagInterpreter.java:230) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTransAndStoreLoiPred(DagInterpreter.java:214) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretTrans(DagInterpreter.java:197) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.ipretNode(DagInterpreter.java:166) at de.uni_freiburg.informatik.ultimate.lib.sifa.DagInterpreter.interpret(DagInterpreter.java:130) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpretLoisInProcedure(IcfgInterpreter.java:139) at de.uni_freiburg.informatik.ultimate.lib.sifa.IcfgInterpreter.interpret(IcfgInterpreter.java:129) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.SifaRunner.(SifaRunner.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleSifa.construct(IpTcStrategyModuleSifa.java:67) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getOrConstruct(IpTcStrategyModuleBase.java:99) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.IpTcStrategyModuleBase.getInterpolantComputationStatus(IpTcStrategyModuleBase.java:75) at de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:287) ... 21 more [2019-10-07 17:14:02,389 INFO L168 Benchmark]: Toolchain (without parser) took 10791.68 ms. Allocated memory was 145.2 MB in the beginning and 445.6 MB in the end (delta: 300.4 MB). Free memory was 102.8 MB in the beginning and 156.4 MB in the end (delta: -53.6 MB). Peak memory consumption was 246.8 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,391 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,392 INFO L168 Benchmark]: CACSL2BoogieTranslator took 454.31 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.6 MB in the beginning and 180.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,394 INFO L168 Benchmark]: Boogie Preprocessor took 49.76 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 178.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,400 INFO L168 Benchmark]: RCFGBuilder took 661.34 ms. Allocated memory is still 202.4 MB. Free memory was 178.0 MB in the beginning and 140.3 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,401 INFO L168 Benchmark]: TraceAbstraction took 9621.27 ms. Allocated memory was 202.4 MB in the beginning and 445.6 MB in the end (delta: 243.3 MB). Free memory was 140.3 MB in the beginning and 156.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 227.2 MB. Max. memory is 7.1 GB. [2019-10-07 17:14:02,412 INFO L335 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 145.2 MB. Free memory was 121.6 MB in the beginning and 121.4 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 454.31 ms. Allocated memory was 145.2 MB in the beginning and 202.4 MB in the end (delta: 57.1 MB). Free memory was 102.6 MB in the beginning and 180.0 MB in the end (delta: -77.4 MB). Peak memory consumption was 19.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 49.76 ms. Allocated memory is still 202.4 MB. Free memory was 180.0 MB in the beginning and 178.0 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * RCFGBuilder took 661.34 ms. Allocated memory is still 202.4 MB. Free memory was 178.0 MB in the beginning and 140.3 MB in the end (delta: 37.7 MB). Peak memory consumption was 37.7 MB. Max. memory is 7.1 GB. * TraceAbstraction took 9621.27 ms. Allocated memory was 202.4 MB in the beginning and 445.6 MB in the end (delta: 243.3 MB). Free memory was 140.3 MB in the beginning and 156.4 MB in the end (delta: -16.1 MB). Peak memory consumption was 227.2 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - ExceptionOrErrorResult: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: AssertionError: java.lang.IllegalArgumentException: Tried to insert element unknown in custom order: ε: de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.tracehandling.TraceAbstractionRefinementEngine.tryExecuteInterpolantGenerator(TraceAbstractionRefinementEngine.java:295) RESULT: Ultimate could not prove your program: Toolchain returned no result. Received shutdown request...